Not all heroes wear capes, some wear laboratory coats. In this book, found as a dusty manuscript at the National Archives, written just after the war for publication but placed under a 25-year censure until 1972, former Research and Experiments Dept., Technical Adviser Arthur Ralph Astbury reveals the wartime secrets of R+E. It seems there was not a single aspect of protecting the civil population from enemy attack that the department didn't touch with a positive outcome. How many lives their innovation and determination saved is incalculable, the fact that they did is incontrovertible.